Box-making machine



March 22, 1927. c BURNHAM 1,621,655

BOX MAKING MACHINE Filed July 29. 1925 9 Sheets-Sheet 1 C. BURNHAM BOXMAKING MACHINE Filed July 29, 1925 9 Sheets-Sheet 2 March 22, 1927.1,621,655

March 22 1927.

C. BURNHAM BOX MAKING MACHINE Filed July 29 1925 9 Sheets-Sheet 5 March22 1927. 1,621,655

C. BURNHAM BOX MAKING MACHINE Filed July 29, 1925 9 Sheets-Sheet 4 ml n9 Sheets-Sheet c. BURNHAM BOX MAKING MACHINE Filed July 29. 1925 z? IENTO Q M BY ATTORNEYS.

March 22, 1927.

22 1927, 1 621 655 March c. BURNHAM BOX MAKING MACHINE Filed July 29,192.5 9 Sheets-Sheet 6 ANN /M S March 22 1927.

C. BURNHAM BOX MAKING MACHINE Filed July 29. 1925 9 Sheets-Sheet '7March 22, 1927. c. BURNHAM 1,621,655

BOX MAKING MACHINE Filed July 29, 1925 9 Sheets-Sheet 8 1,621,655 c.BURNHAM BOX MAKiNG MACHINE March 22 1927.

Filed July 29, 1925 9 Sheets-Sheet 9 11v ENTOR (Zia-4, M

. BY TTORNEYS Patented Mar. 22, 1927.

UNITED STATES CHARLES BURNI-IAM, OF WASHINGTON, DISTRICT OF COLUMBIA.

' BOX-MAKING MACHINE.

Application filed July 29, 1925.

This invention has relation to that type of veneer box-making machinedisclosed in certain former patents granted to me. For example, I referto Patents 1,119,340, December 1, 1914, and 1,252,545, January 8, 1918.The present invention relates to improved mechanism for folding the thinmetal rim-strip into rectangular form for engagement with the rim of thebox and also for folding the shooks into box form and fastening the rimthereto. My latest improved mechanism for forming the channel)inding-rim-strip that is handled by the present mechanism is disclosedin my copending application Serial No. 32,814, filed May 25, 1925. Mylatest improved mechanism for assembling the shooks in the carrier forpresentation to the present mechanism is disclosed in my co-pendingapplication Serial No. 54,102, filed September 2, 1925. This rim-formingmechanism and this shook-handling mechanism will therefore not bedescribed in detail in this application, since, as stated, the presentmechanism has to do solely with the folding of the rim-strip intorectangular form and folding the shooks into. box form and fastening thebox thus folded to the folded rim-strip.

In the drawings Fig. 1 is a rear view of the machine;

Fig. 2 is a view of one end of the machine, part of the casing beingshown in vertical section;

Fig. 3 is a perspective view of the mechanism for operating the shutter;

Fig. 3 is a vertical sectional view showing the shutter in workingposition;

Fig. 3" is a plan view of the mechanism shown in Fig. 3;

Fig. 4 is a horizontal sectional view on the line 44 of Fig. 1;

Fig. 5 is an enlarged plan View, partly in horizontal section, showingthe rear parts of the rim-folding mechanism;

Fig. 6 is a vertical sectional view of the same taken through one of thedash-pots;

Fig. 7 is an enlarged plan view of a part of the rim-folding mechanismshown in Fig. 5;

Fig. 8 is a vertical sectional view on the line El -80f Fig. 7;

Fig. 9 is a vertical sectional view on the line 9-4;) of Fig. 7;

Serial No. 46,872.

Fig. 10 is a diagrammatic View showing the side rim-folding members infolded position;

Fig. 11 is a horizontal sectional view taken through the front part ofthe machine show ing in full lines the front folding members ininoperative position and, in dotted lines, in folded position;

Fig. 12 is a detail side elevation showing one of the front folders inthe position shown inv dotted lines in Fig. 11;

Fig. 12 is a vertical sectional view on the line 12--12 of Fig. 11;

Fig. 13 is a front elevation of a machine as shown in Fig. 1;

Fig. 14 is a vertical sectional view on the line 1414 of Fig. 13;

Fig. 15 is a detail vertical sectional view of one of the box-holdingforks adapted to receive the box after it is completed;

Fig. 16 is a vertical sectional view on the line 1616 of Fig.10;

Fig. 17 is a vertical section on the line 17-17 of Fig. 10;

Fig. 18 is a vertical sectional view on the line 1818 of Fig. 10.

Referring to the annexed drawings by reference-numerals, 2O designatesthe rec1procating carriage which carries the side fold ing members ofthe rim-strip-folding mechanism. As formerly, this carriage isreciprocated from the drive-shaft 21 by a cam 22 and a rocking lever 23,the upper end of this lever being connected to the carriage through themedium of a pair of rods 24. I employ a double cushioning deviceconsisting of a pair of resilient members 25, rubber in the presentinstance, threaded on said rods 24, each pair of these resilient buffermembers being arranged between one of the forked ends 26 of the lever,these forked ends being slidably connected to the rods 24. With thisdouble buffer arrangement, shocks incident to quickly. reciprocating thecarriage back and forth are minimized.

To further minimize the shocks of moving the carriage, particularly thereturn shock, I provide a pair of dash-pots, one at each side of thecarriage and each embodying a cylinder 27 affixed to the frame of themachine and having a piston 28 working therein, the rod 29 of thispiston extendin out through one head of the cylinder and lying in. apositionto be struck by an adjnstable abutment 30 on the carriage, whenthe carriage approaches the end of its return stroke. Free air-passages31 are provided in the forward end of the cylinder 27 and an adjustablerestricted air-pas sage 32 is provided at the rear end of the cylinder.A coil-spring 33, arranged in a guide-cylinder 34 formed on the adjacenthead of the cylinder, normally presses the rod 29 forwardly, this springbeing arranged between the adjacent head of the cylinder and theguide-collar 35 fastened to the rod 29. The operation of these buffersis obvious and need not be particularly set forth. It will be noted thatthese buffers do'not affect the movement of the carriage until thecarriage approaches near the end of its return stroke, whereupon theabutments 30 come in contact with the rods 29. The tube ea and theabutment guide-collar 35' serves to steady and guide the cushioningpiston.

At the front edge of the carriage 20 is mounted the central foldingmember 36 and the two side folding members 37, these two side foldingmembers being pivotally mounted at 38 to levels 39, these levers beingpivotally mounted at d0 to the carriage. The central folder 36 ispivotally connected at its ends to the foloer members 37 by means ofpivots 37", the forward ends of abutments l1 aiiixed to the side foldersbeing provided with notches a2 for engagement with the stop-pins l3carried by the box-former, hereinafter describet. As formerly, when thecarriage is moved forwardly, the notches e2 engage the posts 43 andthen. upon further movement of the carriage, the side wings 37 foldaround the box-former, the pivotal arrangement of levers 39 and thepivots 37 permitting this movement to take place.

It will be observed from Figs. 7 and S'that the abutment members ll arerigidly bolted to the top side of the respective folder plates 37 by apair of bolts 36' and that these bolts also serve to clamp to theunderside of the member 37 a bracket-arm 37 which, together with saidplates 37, forms a fork for the reception of the pivoted ends of thecentral folder 36. This forms a rigid, durable and compact structure,well adapted to take the severe strains of very quick repeatedoperations. The holes through which the pivot-pins 37 respectively passare elongated laterally, as shown in Fig. 10 at 37 The forward ends oflevers 39 normally tend to swing toward each other by reason of theirbeing connected together by a retractile spring 39; the result of theaction of this spring 39 and the elongated slot 37 3 is that the sidefolders 37 have a capacity of yielding away from the central folder uponpressure being applied to them in that direction. This is advantageousin relieving the parts of strain in case the rim-strips pile up on theanvil 80 as they sometimes do, especially in cases where there is afailure in the presentation of shooks to the shook folder mechanism.

The exact alinement of the side folders 37 with the central folder 36 ismaintained by a stop-block 39 fixed on each of the levers 39 adjacent toits pivot 38, these stop-blocks being arranged so that when the carriagereturns to starting position the base plates of the folders 37 swingback against the front edges of these blocks. It will be observed thatthe guiding funnel or trumpet 4:5 in my present structure is mounted onthe carriage instead of as formerly upon an adjacent part of the machineframe. The advantage of this is that this guide funnel is alwaysmaintained in exactly the proper relation to guide the rim-strip letinto the channels of the faces of the folders.

Before the carriage is moved forwardly as thus briefly outlined, thepreviously-channelled rimstrip lais positioned on the front faces of themembers 36 and 37, as formerly, these faces being channelled toreceive'the rim-strip. The rim-strip is slid into these groovesendwisely through a funnel i5 (affixed to the carriage) which is openalong its front face. As the strip passes along into the channels in themembers 36 and 37, it passes behind a pair of hooks e6, one beingcarried by each of the side folders 37, these books serving to hold therim-strip in the channels after the shutter i7 rises, as more fullyhereinafter set forth.

The specific construction of the hooks 4-6 is shown particularly onsheet 5. Each is pivotally mounted on a vertical pivot a3, a coil springa9 being arranged to swing the hook on this pivot in such manner that ittends to lightly clamp the rim-strip in the groove in the folder. Oneedge of each hook is bevelled off at 50 to facilitate entry of therim'strip behind the nose of the hook. Each hook is carried by a bar 51pivotally mounted on a horizontal pivot 52 carried by the folder wing.Spring means are provided for normally tilting this bar 51 in suchmanner as to hold the hook 4L6 down in position, these means consistingof a lag 53, a bell-crank 54 and a ret-ractile spring The rear end ofthebar 51' is slightly turned upwardly so as to impinge against acam-roller 56 and depress said rear end to raise the hooks 4:6 out ofholding position. This is done after the rim-strip is folded about theanvil carried by the box-former, as hereinafter more fully set forth.The cam-rollers 56 are mounted, as shown particularly in Fi l i, on theclamping-jaws hereinafter described, these cam-rollers being positionedto release the rim-strip at the end of the side folding operation, i.e., after the side folders have folded the rim-strip against the anvilcarried by the box-former.

As formerly, the shutter 47 is brought ill) ill)

down to the position shown in Fig. 3, Sheet 2, to close theriui-strip-receiving channel during the passage thereinto of therim-strip, thus insuring proper positioning of the rimstrip on thefolders. F or the purpose of absolutely insuring that the shutter willclose in every instance, even after the machine parts are somewhat wornand there is therefore some lost-motion in the parts, ll pro vide meansfor positively pressing the shutter against the rim-channel, this meansbeing constructed as follows.

A shutter-operating rod 57 is reciprocated, as formerly, by means of asuitable cam arrangement actuated from the main shaft, and the upper endof this rod 57 is pivotally connected to the arm 58 affixed to a shaft Apair of arms 60, extending forwardly, is pivotally mounted on the shaft59, these arms carrying at their forward ends a pivotshaft 61. The endsof the arms 60 are each confined on the shaft- 59 by means of two fixedcollars 62 and 63. The collar 63 is provided with an upstanding; lug 64carrying a set-screw 65 which, when the shaft 59 is roiated overforwardly, strikes against an upstanding lug 66 carried by a loosecollar 67, which is provided with a forwardly-extending arm 68 having alateral tappet 69 in position to strike a lateral lug 70 carried by theadjacent arm 60. The shutter 47 is affixed to the lower ends of a pairof links 71 mounted on the aforesaid shaft 61. The upper end of each ofthese links 71 is connected to its adjacent arm 68 by a retractilespring 72, and this upper end of the link 71 is also pivotally connectedby a rod 73 to the lug 66. Each arm 60 is provided with a finger 7acarrying a setscrew at its end which is adapted to abut against astationary stop 75 on the frame, and each of the collars 67 is providedwith a forwardlyand upwardlyextending finger 76 which is adapted tostrike against a stationary pin-stop 77 carried by the frame of themachine. When the cam-rod 57 moves upwardly and rocks shaft 59, itswings arm 68 downwardly.

The lug 7 O on arm 60 rests on lug 69, and this is the only support thatthe arm 60 has in the raised position. When 69 moves downwardly, tappet70 follows it. While the arm 69 moves down, it pulls on spring 72 whichis attached to the forward end of the shutter mechanism and pulls saidforward end down. The downward movement is controlled by the set-screwon finger 74 and stop 75. lVhen the shutter 47 has been thus broughtdown to the plane of the rimstrip-channel in the folder members, it isnecessary to swing it against the rim-stripchannel to close the channel.This is done by fixed collar 63 and set-screw 65, which strikes lug 66,which moves rod 73 forwardly to rock links 11 on the pivot 61. Thisbrings shutter L7 tightly against the rim-stripchannel. After'therim-strip is fitted endwisely into the channel, the shutter has done itswork andjis then raised in this way; 57

moves rock-shaft which moves tappet 69 up; lug, 7O rests on 69 and iscarried up. Collar 67 has a stop-lug 7 6 which rests against pin-Stop77. The parts are now in normal, raised position, ready for anotheroperation.

After the carriage 20 has moved forwardly and brought the centralfolding member 36 into position to place the rim-strip 44 against theanvil 80 on the box-former, this central folding member 36 is arrestedin its forward movement, while the side folders 37 continue to moveforwardly in. a pivotal manner. To permit this relative body movement ofthe two side folders and at the same time insure alinement of thechannel grooves when the folders are in their back position, I connectthis central folding member 36 to the carriage in such manner that itmay have a resilient independent movement thereon. For this purpose, Iemploy a pair of telescoping tubes 81 and 82, one being mounted on anupstanding lug 83 in the rear edge of the carriage and the other beingaffixed to the member 36 and working through a guide lug 83, anexpansible spring 84- being enclosed within said telescoping tubes. Theforward end of the tube 82 eX- tends through said lug 83 and is held inposition by a nut 85. .In this way, after the folding member 36 comes torest against the box-former, the carriage may continue to move forwardto give the side wings 37 the necessary movement; and upon return of thecarriage to its back position, the spring 84 will insure the foldermembers 36 and 37 properly alining with each other.

I will now describe the front folders, namely, the folders whichcomplete the folding of the rim-strip around the anvil 80. Thismechanism consists, as formerly, of two wings 86 and 87, each of whichis pivotally mounted at 89 and is provided on its face with arim-receiving-groove and at its forward end with a curved notch 90 forengagement with the front pair of the fulcrum posts 43. When the foldersare moved toward the posts 43, the notches engage the 1 same and swingaround against the face of the box-former. As the forwardly-projectingends of the rim-strip have previously been laid in the grooves in thefolders, these ends will be folded around against the anvil 80. Themechanism for actuating the folders is such that the left-hand folderslightly precedes the other folder, means being provided whereby thegroove-carrying member 87 on the right-hand folder is swung downwardlyfar enough to cause the end of the rim-strip carried thereby to besprung under and allowed to snap up into the previously-placed oppositeend of the rim-strip.

The right-hand end of the rim-strip is snapped under the nose of thehook 100 carried by the box-former and provided with a spring device 101for actuating it. The other end of the rim-strip is snapped under a hook102 carried by the box-former. These two hooks together with thecorner-anvils 103 serve to hold the rim-strip in position on thebox-former, against the anvil 80, and thus permit the front folders aswell as the back folders to be withdrawn from the anvil, leaving therim-stripin position to be crimped on the rim of the box.

The hook 102 is shown more particularly in Fig. 18. It will be observedthat this hook is pivoted in the former at 102 and that its.inwardlyextending end is normally forced upwardly by spring 102", tothus swing the depending hook-end toward the anvil 80, which hook-end isprovided with the usual should r for engagement with the outer wing ofthe rim-strip 4 1- when the rim strip is engaged under the hook. Thususing a springactuated pivoted hook instead of a rigidly-supported hookas formerly is advantageous in that this type of hook is more certain toproperly receive and hold the rimstrip 14 when the same is sprungupwardly into the hook. The rim-strips vary slightly in shape,notwithstanding the great care that is used to uniformly shape thestrips; this pivoted hook takes care of these slight Qnaccuraeies andmakes engagement with the hook a certainty.

The folders 86 and 87 are each pivotally mounted, at 89, on the innerends of double levers 104 whose out-er ends are pivoted at 105 to slides106 mounted to slide horizontally in guides 10?, these guides beingaffixed, each, to a pair of vertically-slidable rack-bars 108 mounted inthe frame. These rack-bars 108 are simultaneously moved up and downthrough the medium of pinions 109 carried by a horizontal shaft 110, oneend of which is connected by means of an arm 111 to the upper end of arod 112 whose lower end enters the casing of the frame and is actuatedby a cam mechanism on the main shaft 21. At the proper time, the campermits a coil-pring 113, on the rod 112, to force said rod downwardly,thereby elevating the guides 10? together with. the folder mechanismsmounted thereon. This elevation of the front folders is necessary inview of the fact that during the operation of the side folders 37,heretofore described, these front folders must be positioned down out ofthe way. This lifting mechanism comes into action after the side folders37 have completed their operations and tne ends of the rim-strip arethus swung around into position for engagement by the front folders.

vVhile the front folders are thus being lifted into operative positionby the rack-bar arrangement described, they are being pushed inwardlytoward each other to accomplish the end-folding heretofore described.This is done by moving the slides 106 inwardly, this movement beingaccomplished by means of a rod 114 pivotally connected to the slide at115. The left-hand end of the rod 114; is slidingly connected to an arm116 carried by a shaft 117, an expansible coil-spring 118 beinginterposed between a shoulder on the rod 114 and said arm 116 toeliminate jars as much possible. Rod 117 is rocked by means of a bar 119ailixed thereto and a cama-ctuated rod 120. The other red 11%, attachedto the other slide 107, is actuated by an arm 121 affixed to a shaft122, which shaft is rocked through the medium of another arm 123attached to a vertical. camactuated rod 12-1. Vfith these mechanisms,the frontfolders are at the proper time reciprocated to cause the finalbending of the rim-strip.

As shown in Fig. l, I insert an adjustable coupling 110 in the shaft 110at a point between the two inner pinions 109 to thus divide the shaftinto two sections, rotatively adjustable one with respect to the other;this enables me to nicely adjust the two sections of the shaftindependently to thereby insure an exact operation of the front folders;T his coupling 110 consists of a bevelled head 110' formed on one of theshaft sections and a pair of clamping flanges 10 1-, one of which ismovable and bevelled to fit against the bevelled head 110. When thebolts are tigl tened up, the shaft sections operate as one; uponloosening the bolts, the shaft sections may be adjusted rotatively withrespect to each other and then again clamped up tight.

The pivoting of the levers 10 1 upon the slides permits the frontfolders carried thereby to swing around toward the face of the anvil 80after he notches 90 arrest the forward ends of the folders by engagementwith the fulcrum posts 13. The folders are maintained in normal positionby coilsprings 125 and guide-rods therefor 126. i ldjustment of the frnt folders so that they will accurately engage the fulcrum posts 13 isobtained for each folder by a set-screw 12? mounted in the slide andadapted to hear at its inner end against the vertical pin 128 carried bythe two members of lever 10d and extending through a vertical slot inthe body of the slide. A cavity in the slide encloses coil-spring 129which serves to guide the stop-pin 128 normally pressed against theset-screw. The body of the slide is slotted to permit forward andbackward swinging of the levers 104 with respect to the slide body.

When the right-hand folder, 87, is swung around toward the box-former,it is necessary to tilt its forward end downwardly so that the ends ofthe rim-strip carried thereby shall be tipped down under thepreviously-folded end at the other side. I accomplish this by a cam-toe130 on the forward end of the folder, positioned to ride under a cam'131Elli'lXGCl. to the lower end of one of the adjacent crimping-levershereinafter referred to. To permit the folder 87 to thustilt downwardlyat its forward end, I pivot the same on a pivot 132, a spring 133 beingemployed to hold the folder in its normal up position.

Referring again to Figs. 11, 12, 12, 12", 12" and 12": it will be seenthat the rimgroove member 87 consists of a flat plate pivoted to theface of the main body 87 of the folder by means of the aforesaid pin 132and that the cam-toe 130 is a'liixed to the forward end thereof. Theoperating face of the cam-toe is inclined upwardly and to left, whilethe co-acting face of the cam is inclined outwardly toward the right, asparticularly shown in Fig. 12"; the object of thus oppositely incliningthese cam contacting faces is to utilize these members in exciting apull on the abutment block 43 against the fulcrum-pin 43 during the timethe folding of the rim-end is taking place; this insures an accuratepositioning of the folded rim-end, as is obvious. To still furtherinsure accurate positioning of the tilting plate 87', I provide the samewith an upwardly-facing shoulder 87 which is adapted to abut against anoutwardly-facing shoulder on the part 87, these shoulders being held innormal-contact by means of the aforesaid spring 133. To assist inguiding and holding the member 87 in proper position on the part 8'4", Iprovide the toe 130 with a rearwardly-extending lug 130 which engagesbehind an adjacent lug on the member 87; and to still further guide theswinging member 8?, I form on the adjacent edge of the member 87 a lug87 which overlaps the pivoted end of the'part adj scent its pivot 132.The rim-groove is foiined in a separate metal bar 87 which clamped tothe face of the bar 8'? by means of a clamp-plate 87 The two veneer boxshooks to form each box are delivered to the machine in crossedrelation, as formerly, by the usual step-bystep rotary turret carrier150, the shooks being deposited on the carrierby means of a pneumaticpic er mechanism illustrated in my former patents and also, in itslatest form, in my co-pending application Serial No. 54,102, filedSeptember 2, 1925. The present carrier is substantially the same as myformer carrier except that I provide a nio'e eticient means 'forreceiving and hold- .he'ci ossedshook blanks-"151. Instead I ingle 1i aat eaclifofthe four sides of filer engaging the ed'ges 'of' tlie shock,I provide, as shown particularly in the 131 upwardly and outwardly.

Fig. 14, a series of flanges 152 arranged on an oblique or slightlyconveXed line inclining With this arrangement of flanges or notches, Ihave experienced less trouble on account of slight variations inthelength of shooks a slightly shorter shook will be forced down to apair of the lower notches, whereas a slightly longer-shook will engage apair of notches a little higher. 2

From an inspection of Fig. 14, it will be. ol'iserved th at when eachshook is jammed into the serrated holding-lugs 152, it convenesdownwardly until it upon a stop-lug 152 projecting inwardly from thefootof the serrated lug. It will be observed that one pair of thesestop-lugs 152 is thicker than the companion pair, to bring their-ar,resting faces in a higher plane; the object of this is to alwaysinsurestopping the second shook before it comes in contact with thepreviously-placed shook, to thereby prevent the latter shook from beingpushed out of the carrier.

The carrier delivers the crossed shooks between the usual lower plunger153 and the usual box-former 154, which latter is mountedon the lowerend of a vertically-reciprocable post 155. The plunger 153 carries thefolder-wings 156 pivotally mounted at 157. This plunger is adapted tomove upwardly and assist the previously-lowered box-former in centrallyclamping the pair of crossed shooks while the foldenwings 156simultaneously fold upwardly the four sides of the box; The foldingoperating of the wings 156 is accomplished by means of pivoted levers158 whichare actuated as formerly. The mechanism for reciprocating theplunger 153 is not illustrated in this application, as it issubstantially the same as in my former patents. In the presentapplication, I illustrate an improvement of the-folderwings 156. Thisconsists in applying to the free edge of the wing a spring-pressed hp159, held yieldingly against the lower bevelled edge of the folder-wingby a spring 160. I have found in practice that this yielding pressurelip 159 readily accommodates itself to shooks of different thicknessesand insures the positioning of the upper edges of the folded shook inalinementwith the downwardly-opening rim-channel 44 which atthat time ison the anvil 80. I

lVithin the box-former 154 is mounted a resser-foot 161 which isslidingly mounted within the post and is actuated by mechanism disclosedin my former patent. At the beginning of the box-folding operation, thispresser-foot is forced downwardly toward the rising plunger 153a11dserves to clamp the crossed box shooks against'the plunger and to holdthe same therea'galinst while the upfol'ding wings .156 are' aeti iig.To insure a resilient clamping action and also to insure ejection of thebox from the box-former after the crimping of the rim 44 is completed, Imount upon the presser-foot 161 the usual spring-actuated ejector 162.This ejector is constructed as formerly, except that I provide a moreefficient means for arresting its downward movement against the actionof its springs; it is constructed as follows: The foot-piece 162 isprovided with a central tube 103 which 62(- tends up into the hollowshaft which carries the presser-foot 161, and in the upper end of thistube 163 I thread an adjustable stoppin 164 whose lower end abutsagainst the cross-pin 165 mounted in the box-former and extendingthrough longitudinal slots in the tube 163. With this device, I may verypos itively and nicely regulate the amount of movement of the resilientclamp-ejector 162. It will be understood that after the box shocks arethus clamped together on the plunger 153 and the wings 156 areactuating, both the plunger and the Presser-foot 161 move upwardly farenough to bring the folded members of the box against the usual yieldingside walls carried by the box-former up into the channel of therim-strip 44. Continned movement of these parts together with a slightupward movement oi? the boxformer brings the rim-strip 44 intohorizontal alinement with the usual crimping-jaws 167, whereupon thecrimping operation takes place in the usual manner. The plunger 153 andthe presser-foot then descend, thus stripping the b0); from the former,and the action of the ejector 162 insures the box being delivered offthe presser-foot 161, whence it drops into the forked lingers 168carried by the carrier. In the next rotativestep of the carrier, thecompleted box is moved to a po sition where it may be convenientlyejected from the carrier. Instead of using rigid basketdiolding forks168 as in my former structures, I pivot the fork at 169 (see Fig. 15) toa horizontal pin 170 mounted in the frameof the carrier and provide a.contrac- V tile spring 171 for normally holding the fork upwardly. Whenthe shooks are ammed into the carrier, these forks yield downwardly, asshown in Fig. 15, to a position out of the way; when the sides of thebasket are folded upwardly, these forks'spring back into proper positionfor holding the basket when it is completed and lowered into thecarrier. A stop-pin 1'72 limits the upward movement of the fork.

7 By inspection of Figs. 15 and 15, it will be observed that thesupporting pin 170 is adjustable not only inwardly and outwardly,

but also rotatively within its support, this being accomplished by meansof a spring clamp 170 which is adapted to clasp the pin 170.

The crimping-jaws 167 are actuated, as

formerly, by a sliding sleeve 17 3 mounted on the central tube 174carrying the post 155. This sleeve 173 is actuated from the cam-shaft ofthe machine, as formerly. Upon upward motion of this sleeve, each of thetoggle members 17 5 swings outwardly the upper end of the lever whichcarries the crimpingjaw, this lever being pivoted at 17 6 on astationary part of the machine and being in the present instanceconstructed of two parts as follows: The main part 177 carries acrimping-jaw 167 and the other part 178 is in engagement with togglemember 175 and is pivoted at 179 to the aforesaid main member 177. Ascrew bolt 180 connects these two parts of the lever, and interposedbetween these two parts is a rubber cushion 181. The object in thusmaking the crimping lever a two-part appliance and in introducing acushioning element therebetween is to not only reduce shock but alsoinsure a complete and accurate crimping of the rim-strip 44.

The rim-strip corner-a-nvils 103 are not stationarily mounted as in myformer construction, but are movably mounted in the following manner:Each anvil is slidingly mounted in the box-former head so as to moveradially with respect thereto. An adjustable screw stop-pin 182 limitsthe inward movement of the anvil 103 and the adjacent fulcrum post 43limits its outward movement. The stop-pin 182 is carried by a shoe 183which straddles the shank of the anvil 103 and has a lost-motionconnection therewith through the medium of a pin 184 carried by the shoe183 and a lug 185 carried by the shank. A short rocking lever 186,pivoted at 187, has a pivotal connection with the shoe 183 at the lowerend of the lever. The upper end of the lever carries a roller 189 whichengages a cam-member 190 affixed adjustably to the frame of the machineby means of a bolt 191 working through a slot 192 formed in saidcammember. The inner face of the cam-member 190 is so shaped that whenthe former head is in its lower position, as shown in Fig. 16, the cam-rller 189 will lie against the inwardlyprojecting surface of the cam andthe anvil 103 will" thus be held in its projected position, i. e., inthe position that it occupies when the rim-strip 44 is folded againstit. The parts remain in this position until the box is elevated intocrimping position, whereupon the cam-roller 189,

runs down off the cam surface and thus draws the anvil 103 inwardly farenough to release the crimping strip 144, thereby permitting the easyremoval of the rim-strip from the four corner-anvils 103 when the.

completed box is lowered to ejecting position. This prevents the boxsticking to the corner-anvils 103. The anvil-actuating levers 186 areeach held against the cam face of part 190 by means of a retractilespring 193.

What I claim as new is:

1. In a machine of the type set forth, a carriage carrying the rim sidefolders and means for reciprocating said carriage toward and from thebasket-former, said means embodying a rocking lever and a double bufferconnection between said rocking lever and the carriage adapted tocushion the movement of the carriage on its advance stroke as well asits return stroke.

2. In a machine of the type set forth, a carriage carrying the rim sidefolders and means for reciprocating said carriage toward and from thebasket-former, said means embodying a rocking lever and a double buflerconnection between said rocking lever and the carriage adapted tocushion the movement of the carriage on its advance stroke as well asits return stroke, said double buffer connection embodying a pair ofrods affixed to the carriage and having a slidable connection with saidlevers, buffers on the rods in front of the lever and also buflers onthe rods at the rear of the lever, for the purpose set forth.

3. In a machine of the type set forth, a carriage carrying foldingmembers, means for reciprocating the carriage, and means for bufling thereturn stroke of the carriage embodying a dash-pot device at each sideedge of the carriage.

4. In a machine of the type set forth, a carriage carrying foldingmembers, means for reciprocating the carriage, and means for bufling thereturn stroke of the carriage embodying a dash-pot device at each sideedge of the carriage, each of said dash-pot devices embodying a cylinderaffixed to the frame of the machine, a piston working 111 said cylinderhaving a rod extending out through one head of the cylinder, a springfor normally advancing the piston, and a pair of abutments on thecarriage adapted to impact against the forward end of said rods when thecarriage returns.

5. In a machine of the type set forth, a reciprocating carriage andmeans thereon for folding the rim-strip around the formeranvil embodyinga pair of side folders channelled to receive the rim-strip, aspring-ac-- tuated hook on each of saidside folders, means whereby eachhook is normally held in working position with its nose across thechannel and normally swung laterally toward the channel, and means onthe frame for automatically shifting said hook out of working positionafter the completion of the folding operation, mainlamaqh n of I re pocating m ies e am ss-1; t mes {f ding-t is-..main a u s theiorna ranvilembodying a pair of side folders chanthe. type forth,

mounted on said other member, and a spring for swinging said hook memberlaterally to swing the nose of the hook toward the channel, for thepurposes set forth.

7. In a machine of the type set forth, a reciprocating carriage carryingfolding members having a rim-receiving open channel in their faces, andmeans for automatically closing said channel and holding it closeduntilthe rim-strip is inserted there? in endwisely, said means embodyinga shutter extending substantially the length of the channel, means forautomatically positioning said shutter to close the channel, and devicesfor automatically pressing said shutter against the channel members, forthe purpose set forth.

8. In a machine of the type set forth, 1. 1

reciprocating carriage carrying folding members having a rim-receivingopen channel in their faces, and means for automatn cally closing saidchannel and holding it closed until the rim-strip is inserted thereinendwisely, said means embodying a sl'iut'ter ext-ending substantiallythe length of the channel, means for automatically positioning saidshutter to close the channel, and devices for automatically pressingsaid shutter against the channel members, said latter means embodying areturn spring and devices for tensioning the same through the medium ofthe devices for positioning the shutter alongside the channel.

9. In a machine of the type set forth, a carriage carrying rim-foldingdevices havlng an open channel on their faces to endwisely receive therim-strip, a shutter extending the length of said channel and adapted toclose the open side thereof while the rim-strip is passing thereinto,and means for actuating the said shutter embodying a rock-shaft, armsloosely pivoted thereon, shutter-carrying levers pivotally mounted onthe ends of said arms, means actuated from the rock-shaft for bodilydepressing said levers to bring the shutter into horizontal alinementwiththe channels, andmeans actuated from said rock-shaft for positivelyforcingsaidshutter against the channel members to thereby, closefthe'channel.

a.eeaeh eaietitlefli t at ii i.

. iiee r ea int rmarriage F f folding members, a central mtwo side pairof front rim-folding members normally below the plane of operation, andmeans for raising said members into position for operation and foractuating them embodying a slide for carrying each member, a guide foreach slide, and means for vertically raising and lowering said guide onthe machine frame.

12. In a machine of the type set forth, a pair of front rim-foldingmembers normally below the plane of operation, and

' means for raising said members into po h tion for operation and foractuating them embodying a. slide for carryingeach member, a guide foreach slide, and means for vertically raisingand lowering; said guide onthe machine frame, said means for raising and lowering the two guidesembodying a rock-shaft carrying pinions, apair of.

rack-bars carrying each guide, and means for automatically actuatingsaid shaft.

13. In a machine of the type set forth, a pair of front rim-foldingmembers normally below the plane of operation, and means for raisingsaid members into position for operation and for actuating themembodying a slide for carrying each member, a guide for each slide, andmeans for vertically raising and lowering said guides on the machineframe, means being provided whereby the slides are automatically movedinwardly to cause the folder members to operate after they are raised totheir operative plane.

14. In a machine of the class set forth, a pair of pivoted frontrim-folding members and means for swinging them around against the frontface of the anvil to bring the ends of the channel rim into overlappingrelation, said means embodying a canrtoe on one of the members and a camon an adjacentpart of the machine whereby said folding member is tiltedto bring the end of 'the rim-strip underneath the previouslyfoldedrim-strip end.

15. Ina machine of the class set forth embodying a former, corner-anvilscarried by the former, each anvil being slidably mounted in the formerso as to move up and down therewith, and means whereby all the anvilsare withdrawn inwardly to released position when the former is raised.

16. In a machine of the class set forth embodying a former,corner-anvils carried by the former, each anvil being slidably mountedin the former so as to move up and down therewith, and means wnereby allthe anvils are withdrawn inwardly to released position when the formeris raised, said means embodying a cam on the machine frame and a rockinglever on the former.

17. In a machine of the class set forth embodying a former,corner-anvils carried by the former, each anvil being slidably mountedin the former so as to move up and down therewith, and means whereby allthe anvils are withdrawn inwardly to released position when the formeris raised, said means embodying a slidable shoe mounted in the head inengagement with the anvil and carrying an adjustable stoppin, a leverpivoted on the head and having one end in engagement with said shoe, acam for engaging the other end of the lever, and a spring for holdingthe latter end of the lever in engagement with the cam.

18. In a machine of the class set forth, a carriage carrying a centralrim-folder and two end run-folders pivotally connected to the centralfolder, a limited lost-motion being provided for between each end folderand the adjacent end of the central folder, and spring means fornormally taking up this lost-motion and permitting the end folders toyield away from the center folder, for the purpose set forth.

19. In a machine of the type set forth, a carriage carrying a centralfolder and two end folders, arms pivoted to the carriage and alsopivotally and movably connected to the end folders, and a springconnecting these arms to normally draw them together at the endscarrying the end folders, whereby the end folders may yield away fromthe central folder, for the purpose set forth.

20. In a box machine of the class set forth, areciprocating carriagecarrying articulated folders having rim-receiving alined channels, and aguiding funnel for said channels carried on said carriage.

21. In a box-folding machine of the type set forth, a reciprocatingcarriage carrying three rim-folding members and means for causing thetwo outer members to fold forwardly when the carriage is moved in thatdirection, said folding members having rimholding alined grooves, arim-holding hook carried by each oneof the end folders, and means forreleasing said hooks when the folders'reach their final position.

29.. In machine of the type set forth, a pair of front folders and meansfor elevating them into operative position with respect to thebox-former embodying a shaft and pinions thereon, said shaft beingdivided into two sections, andmeans being provided whereby thesesections are rotatively adjustable with respect to each other.

23. In a machine of the class set forth, a box-former carrying arim-strip anvil, a pair of hooks carried by the former one adapted toreceive and hold the first end of the rim-strip that is folded againstthe anvil, said hook being pivotally mounted on the former in positionto swing toward and from the anvil, and means being provided fornormally swinging said hook toward the anvil, for the purpose set forth.

2%. In a machine of the class set forth, a pair of front folders one ofwhich embodies a swinging folder carrying a rim-groove carrying memberpivotally mounted on the face of the folder, a spring for normallyholding this member in position, and cam means for swinging this memberdownwardly during the act of folding, this cam means embodying two cammembers whose contacting faces oppositely incline to thus insure thefolder being pulled against the fulcrumpin during the act of folding.

25. In a machine of the class set forth embodying a box former, a frontfolder and means for raising and lowering it and moving it inwardly andoutwardly with re.- spect to the box-former, said folder embodying aswinging body member, a rimgroove carrying plate pivotally mounted onsaid body member, a lug carried by said plate and engaging behind aco-acting lug on said body member, a lug on the'body member overlappingthe face of the plate, a spring operating to hold said plate in its upposition, and cam members for depressing the free end of said plateduring the act of folding.

In testimony whereof I hereunto afiix my signature.

CHARLES BURNHAM.

